Malicious PDF — malware analysis report

Static analysis result for SHA-256 04095c00230831e9…

MALICIOUS

PDF

45.2 KB Created: 2020-08-31 14:24:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc200f1d94c62f1447bd2c4f51b301ee SHA-1: cce66db227c383429ff990385f272404024f2382 SHA-256: 04095c00230831e906df3eb4dd210ad927579832312b64eef6d516d061b9c211
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with a critical heuristic firing indicating it points to known malicious redirector infrastructure. The primary malicious URL identified is 'https://ttraff.com/pify?keyword=abstract+example+engineering+report'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users to a malicious site. The presence of a large number of external PDF links, many pointing to benign Shopify domains, suggests a link farm or SEO manipulation tactic to obscure the malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=abstract+example+engineering+report
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/4479/7607/files/nazugazezofefuwaz.pdf
    • https://cdn.shopify.com/s/files/1/0447/9077/5965/files/amar_chitra_katha_bahubali_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/4393/7690/files/32081391275.pdf
    • https://cdn.shopify.com/s/files/1/0448/2046/3776/files/80878722977.pdf
    • https://static.usrfiles.com/ugd/238140_ee89e9e3651c4405b5ecd06a8bb66065.pdf
    • https://static.usrfiles.com/ugd/a6e5e9_66aa5b17f7994d6a9b35367be2a8a963.pdf
    • https://static.usrfiles.com/ugd/f7fbc8_57e187f165e34b27b75b1299d5c20151.pdf
    • https://static.usrfiles.com/ugd/b8c837_2f1d43a79d42465ea811eaa6c8d4cbc0.pdf
    • https://static.usrfiles.com/ugd/c7a620_05f03cab611740f4a8f5db8c36943e4a.pdf
    • https://cdn.shopify.com/s/files/1/0433/9610/4348/files/xujevejazabenegazek.pdf
    • https://cdn.shopify.com/s/files/1/0440/4002/8325/files/90266873346.pdf
    • https://cdn.shopify.com/s/files/1/0429/2653/8911/files/56948786706.pdf
    • https://static.usrfiles.com/ugd/b8c837_a0bf76ed2e9d4340941d420442a5ad67.pdf
    • https://static.usrfiles.com/ugd/3fc21f_cfd2906b9fe84fbe8aa79e2c19ba844a.pdf
    • https://static.usrfiles.com/ugd/2c7c49_26ab1b84f7af4d8daa7c6334af4b8d9a.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007283.bin
d75231ce545e8ec95201c6d200aeb449d80064fefacb4a9a45156c036877e6af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7283 5452 bytes
font_01_sfnt_off000084f6.bin
75f8dd735d7e86ed961839233be6e9d1cc661e4a2eb4b91178b9699f5d2ba434		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84F6 10296 bytes

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